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      1 /*
      2  * Copyright (C) 2012 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef WebGraphicsMemoryAllocation_h
     27 #define WebGraphicsMemoryAllocation_h
     28 
     29 #include "WebCommon.h"
     30 
     31 namespace WebKit {
     32 
     33 struct WebGraphicsMemoryAllocation {
     34     // Deprecated data, to be removed from this structure.
     35     unsigned gpuResourceSizeInBytes;
     36     bool suggestHaveBackbuffer;
     37 
     38     enum PriorityCutoff {
     39         // Allow no allocations.
     40         PriorityCutoffAllowNothing,
     41         // Allow only allocations that are visible.
     42         PriorityCutoffAllowVisibleOnly,
     43         // Allow only allocations that are few screens away from being visible.
     44         PriorityCutoffAllowVisibleAndNearby,
     45         // Allow all allocations.
     46         PriorityCutoffAllowEverything,
     47     };
     48 
     49     // Limits when this renderer is visible.
     50     size_t bytesLimitWhenVisible;
     51     PriorityCutoff priorityCutoffWhenVisible;
     52 
     53     // Limits when this renderer is not visible.
     54     size_t bytesLimitWhenNotVisible;
     55     PriorityCutoff priorityCutoffWhenNotVisible;
     56     bool haveBackbufferWhenNotVisible;
     57 
     58     WebGraphicsMemoryAllocation()
     59         : gpuResourceSizeInBytes(0)
     60         , suggestHaveBackbuffer(false)
     61         , bytesLimitWhenVisible(0)
     62         , priorityCutoffWhenVisible(PriorityCutoffAllowNothing)
     63         , bytesLimitWhenNotVisible(0)
     64         , priorityCutoffWhenNotVisible(PriorityCutoffAllowNothing)
     65         , haveBackbufferWhenNotVisible(false)
     66     {
     67     }
     68 
     69     WebGraphicsMemoryAllocation(unsigned gpuResourceSizeInBytes, bool suggestHaveBackbuffer)
     70         : gpuResourceSizeInBytes(gpuResourceSizeInBytes)
     71         , suggestHaveBackbuffer(suggestHaveBackbuffer)
     72         , bytesLimitWhenVisible(0)
     73         , priorityCutoffWhenVisible(PriorityCutoffAllowNothing)
     74         , bytesLimitWhenNotVisible(0)
     75         , priorityCutoffWhenNotVisible(PriorityCutoffAllowNothing)
     76         , haveBackbufferWhenNotVisible(false)
     77     {
     78     }
     79 };
     80 
     81 } // namespace WebKit
     82 
     83 #endif
     84 
     85